One night in the 4th year of marriage, as soon as my husband took a bath, my father-in-law who lives with me attacked me and was raped in vain. "I'm sorry, dear..." At the same time as feeling immoral, Akiho realizes the pleasure he has had for the first time in a long time.She gradually accepts her father-in-law who comes to him every night.Her forbidden sexual intercourse that should not be exposed gradually escalates and finally even in the dressing room.I can't wait for the forbidden 30 minutes that I can never say to my husband tonight. "You, the bath is boiling--"